First, we need to find the original ratio of 7th to 6th
6th = 12
7th = 21
21:12
Then find any common factors
21: 1,3,7,21
12: 1,2,3,4,6,12
divide 21 and 12 both by 3
21/ 3 = 7
12 / 3 = 4
7:4 is your ratio
For every 7 students in 7th grade, there are 4 students in 6th grade.
Answer:
x either equals to 4 of 9 so you can write it like x=4, 9
Step-by-step explanation:
Start by simplifying each sides of the equation.
x^2-13x+36=0
Then factor the left side of the equation.
(x-4)(x-9)=0
Set factors equal to 0
x-4=0 or x-9=0
x=4 or x=9
Answer:
$52
Step-by-step explanation:
5 packages = $32.50
divide both sides by 5
1 package = $6.50
times by 8
8 package = $52
In this situation, the order matters, since being 1st pick is not the same as being 2nd or 3rd. Therefore, there are 14 choices for the first pick, 13 remaining for the second pick, and 12 for the third pick. This is equivalent to the permutation 12P3.
ways
(If order did not matter, this would use a combination.)